CPM-s90v Tanto

farid.

farid.

Knife Maker
Knifemaker / Craftsman / Service Provider
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CPM-s90v Tanto
Made from 5/16" CPM-s90v steel 61rc, 10" overall, 5.5" blade, handle is red cord, the edge on this knife is honed to a rolled convex edge, full tang for maximum strength. This is a very heavy duty knife with a high performance Crucible steel. No sheath. thanks for looking, Farid


 
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I wrote , still not received a response from moderators.
question about steel cpm rex 121
 
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slava77 said:
I wrote , still not received a response from moderators.
question about steel cpm rex 121.more accurate test results on cutting rope.strange results.
I understand that the geometry of the blade is not very suitable for such tests.but I was expecting better edge retention.
for example,at similar sharpening,30 degrees angle and similar geometry(scrap),knife from KR Enki Vanadis 4E gave the best result in several times.
You too love tests. I hope you will help me to understand what the problem. in general I am satisfied with K2 folder,is a unique knife.I really appreciate your work.
about details better on my pm ,I think so...
thanks in advance
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Hi slava, in the past the question has come up regarding the edge retention of the CPM-REX 121 steel, it was never designed for the knife industry as it is primarily a ‘Tooling Steel’ designed to bridge the gap between solid carbide tooling and high speed steels, you will get the REX 121 quite sharp with CBN around 4 micron right at the edge but it will never retain a hair popping sharpness, bottom line is it is around 38% carbide and was never designed for knives but due to the kind of maker that I am I like to sometimes experiment with steels nobody else have used in this industry and also it gives everybody an opportunity to experiment with different steels too, it is a quest to find out about steels. Although I like to experiment with different steels I will say a grade of steel with much lower carbide will be more suited for the knife industry but that will not stop me experimenting with different grades of steels.
I hope to some degree I have answered your question.
As time goes by I am getting closer to making up my mind which grade of steel I think is superior for a knife application, when I’m ready I will share with everyone what I have learned.
Thank you
F
 
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Hi Farid ! glad to see you !
I also love the evil steels )
Thank you for the quick response.Yes, I understand you,reason is carbide size.sharpening on the DMT 220(60mic) most optimal,in this instance.and it showed my tests.
twice as the best result than the finish on the DMT 1200(9mic).
I heard you do not plan to do K2 cpm rex 121.and how much was made of knives К2 rex ?
yours respectfully
Slava
 
slava77 said:
Hi Farid ! glad to see you !
I also love the evil steels )
Thank you for the quick response.Yes, I understand you,reason is carbide size.sharpening on the DMT 220(60mic) most optimal,in this instance.and it showed my tests.
twice as the best result than the finish on the DMT 1200(9mic).
I heard you do not plan to do K2 cpm rex 121.and how much was made of knives К2 rex ?
yours respectfully
Slava
Click to expand...

emailed you.
 
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